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압전소자를 이용한 에너지 하베스터용 전력변환장치 연구

A Study of Power Conversion System for Energy Harvester Using a Piezoelectric Materials

  • An, Hyunsung (Dept. of Electrical Engineering, Chungnam National University) ;
  • Kim, Young-Cheol (System Dynamics Research Laboratory, Korea Institute of Machinery & Materials) ;
  • Cha, Hanju (Dept. of Electrical Engineering, Chungnam National University)
  • 투고 : 2017.04.17
  • 심사 : 2017.06.22
  • 발행 : 2017.07.01

초록

In this paper, the energy harvester with a piezoelectric materials is modeled as the electric equivalent circuit, and performances of a standard DC method and a Parallel-SSHI method are verified through experiment under variable force and load conditions. Piezoelectric generator consists of mass, damper and spring constant, and it is modeled by electrical equivalent circuit with RLC components. Standard DC and Parallel-SSHI are used as power conversion methods, and standard DC consists of full-bridge rectifier and smoothing capacitor. Parallel-SSHI method is composed of L-C resonant circuit, zero-crossing detector and full-bridge rectifier. In case of simulation under $100k{\Omega}$ load condition, the harvested power is $500{\mu}W$ in Standard DC and $670{\mu}W$ in Parallel-SSHI, respectively. In experiment, the harvested power under $100k{\Omega}$ load condition is $420{\mu}W$ in standard DC and $602{\mu}W$ in Parallel-SSHI. Harvested power of Parallel-SSHI is improved by approximately 40% more than that of standard DC method.

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참고문헌

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